Steam-boiler furnace



(No Model.) v 38heets-Sheet 1. T. R. BUTMAN.

STEAM BOILER FURNACE. No., 512,536. Patented Jan. 9, 1894.

(No Model.) '3Sheets-Sheet 2.

I T. R. 'BUTMAN.

- STEAM BOILER FURNAGE- N0. 512,536. Patented Jan. 9, I894,

(No Model.) s s heets-sheet 3.

T. R.BUTMAN. STEAM BOILER FURNACE. No. 512,536. Patented Jan. 9,-1894.

UNITED STATES PATENT THOMAS REED BITTMAN, OF CHICAGO, ILLINOIS.

STEAM-BOILER FURNACE.

SPECIFICATION forming part of Letters Patent No. 512,536, dated January9, 1894. Application filed March 30, 1893- Serial No. 468,321. (Nomodel.)

To all whom it may concern.-

Be it known that I, THOMAS REED BUTMAN, of Chicago, in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Steam-Boiler Furnaces; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the letters of reference marked thereon, which form part of thisspecification.

This invention relates to certain improvements in steam boiler furnaces.The object of the invention is to provide an improved steam boilerexceedingly cheap, simple and durable in construction, and wherein allthe heat will be fully utilized with a minimum expenditure of fuel.

A further object of the invention is to improve certain details inconstruction, and in arrangements of parts whereby a greatly improvedand highly efficient stationary boiler of the marine or locomotive typeis produced, possessing many features of advantage and great utility.

The invention consists in certain novel features of construction and incombinations of parts more fully described hereinafter and particularlypointed out in the claims.

Referring to the accompanying drawings, Figure 1 is a longitudinalvertical sectional view of the improved boiler. Fig. 2 is ahorizontalsectional view of a portion thereof taken in the plane of the lines 0,C, Fig. 1. Fig. 3 is a similar view on line D-G', Fig. 1. Figs. land 5,are cross sectional views, respectively, on the lines A-A and 13-13,Fig. 1.

In the drawings the reference letter a, indicates the outer shell of thehorizontal tubular boiler of the marine or locomotive type. This shellis provided with the extension I), from one end thereof. The horizontalfire tubes traversing the water space of the boiler are arranged inupper group b, and lower group 0; the tubes of the lower group 0, beingpreferably larger in diameter than the tubes of the upper group b. Therear ends of these tubes communicate through the medium of the smoke boxor chamber (1, in the rear end of the shell. The outer head of theboiler is provided with doors 6, opening into the said smoke box orchamber so that access can be easily had to the rear ends of the firetubes for the purpose hereinafter more fully described. The outer end orhead of the boiler is also provided with a man hole f, to permit easyaccess to the man hole g, through the tube sheet into the boiler. A manhole It is also located in the rear tube sheet at the space between therear end of the upper and lower groups of tubes. y

In the front extension of the boiler shell a furnace is located. Thisfurnace is built up of fire brick or any other suitable refractorymaterial within the front extension of the boiler shell.

t, indicates the grate bars of the furnace above which the fire pot islocated and formed by the refractory sides, and the arch j, ofrefractory material located longitudinally within said extension of theshell, and separating the front ends of the two groups of fire tubes.

70, indicates the bridge wall located a distance from the front tubesheet and the front ends of the fire tubes, so as to leave thecombustion chamber Z, between the fire tubes and the bridge wall, theproducts of combustion,

850., passing over the bridge wall and just below the arch of refractorymaterial. The

bridge wall is provided with transverse openings m, in its lowerportion, normally closed by doors 0' so that access can be had to theash pit through said openings into the combustion chamber in rear of thebridge wall to remove the collection of soot, &c.', which will becomedeposited in the bottom of said combustion chamber. This is a point ofimportance. The arch forming the top of the furnace extends-from thefront tube sheet of the boiler, separating the front ends of the twogroups of tubes, through the front end or front of the furnace, thusforming the smoke chamber within the upper portion of the extension ofthe shell above said arch, the chamber opening into the uptake orchimney 0. A vertical partition p is located in the front portion ofthis chamber separating off the hot air chamber 7, in the front end ofthe shell. A

door or manhole q, is located in this partition so that access can behad through the front of the furnace and through said door to theinterior of the combustion chamber. A menace as clearly shown in Fig. 1.

tallic or other jacket .9, is located above the arch forming the top ofthe furnace so as to leave the air space 25, between said jacket and thearch or partition of refractory material. The airspace is arranged toopen into the front air chamber at the front end of the fur- Therefractory material within the shell forming the sides of the combustionchamber is located a distance from the shell so as to leave the airspace or channel a, as shown, at the upper ends communicating with theair space between the arch and the metallic jacket. The bottom of theshell is provided with holes or apertures as shown so that air from theouter atmosphere can flow into said air space around the combustionchamber wherein it is highly heated and will then flow up above the archinto the said hot air chamber. By this arrangement the heat is preventedradiating off from the furnace and furthermore the shell and metallicparts are prevented from being injured by the interposed air space. Aseries of injectors o, are located Within said hot air box with theirdischarge ends opening into the fire box of the furnace so as todischarge over the incandescent fuel in the fire box. Steam is suppliedto these injectors through pipes to, each pipe being provided with acontrolling valve 20, extending to the exterior of the furnace front. Bymeans of these injectors the hot air and steam are discharged over theincandescent fuel in the fire box, thereby furnishing the requirementsof a perfect combustion of fuel, and tending to consume all carbon andthereby prevent smoke and deposit of soot, &c., without mentioningeconomy in fuel and a maximum degree of heat produced.

It should be carefully noted that the furnace is so arranged andconstructed and the other parts of the entire boiler are so arranged andconstructed that no waste of heat occurs, but all the heat is utilizedin accomplishing the object desired of converting heat into energy byvaporizing the water by burning the fuel in a furnace lined withrefractory material, more perfect combustion is obtained, the gases areprevented from coming in contact with the metal surfaces, untilcombustion is completed; hence better results are obtained from the fueland the deposit of soot in tubes, andemission of smoke is largelyabated. The doors and manholes at the rear end of the boiler areprovided so that the tubes can be cleaned from the rear end. The soot,650., falling out into the combustion chamber can be removed through thedoors in the bridge wall.

It is evident that various changes and variations might be made andresorted to in the forms, constructions and arrangements of the partsdescribed without departing from the spirit and scope of my invention;hence I do not Wish to limit myself to the exact construc tion hereshown, but consider myself entitled to all such changes as fall withinthe spirit and scope of my invention.

Having thus fully described my invention, what 'I claim as new, anddesire to secure by Letters Patent of the United States, is-

1. A boiler having its furnace located in an extension thereof, airspaces surrounding said furnace, and means arranged to discharge theheated air therefrom into the fire pot of the furnace, substantially asdescribed.

2. A tubular boiler of the locomotive or marine type having itsextension provided w th a furnace built therein of refractory material,air spaces around the refractory material, and means for discharging theheated air from said spaces into the fire pot of the furnace,substantially as described.

3. The furnace built of refractory material, air spaces around saidfurnace communicating with the outer atmosphere, a hot air chamber intowhich said air spaces are adapted to discharge, injectors located insaid hot air chamber, and arranged to discharge upon the fuel in thefurnace, and steam connections from the boiler to said injectorssubstantially as and for the purposes setforth.

4. The horizontal tubular boiler provided with the furnace built ofrefractory material in its front end extension, with the combustionchamber between the bridge wall of the furnace and the front ends of thefire tubes, air spaces between the lining of said combustion chamber,and the shell communicating with the outer atmosphere, and an air spaceon the arch of the furnace with which said first mentioned air spacescommunicate, and a hot air chamberlocated above said furnace and fromwhich the hot air is discharged into the fire pot of the furnace,substantially as described.

5. The horizontal tubular boiler of the locomotive or marine type havingits tubes arranged in upper and lower groups, the smoke chamber at therear end of the boiler connecting the rear ends of said tubes, doors inthe rear end of the boiler head through which access can be had to cleansaid tubes, the front end of the boiler having the shell extension,a-furnace located in said shell extension having the bridge wall adistance from the front ends of the lower group of tubes forming thecombustion chamber, openings through the lower portion of the bridgewall into the bottom of said chamber so that the soot and dirt forcedout of the tubes into said chamber by cleaning the tubes can be removedfrom the chamber through said opening, substantially as and for thepurposesset forth.

6. A steam boiler comprising the horizontal elongated shell ofsubstantially the same size throughout including the horizontal firetubes extending through a portion only of the length thereof and thefurnace built of refractory material in the front end of said shell asdescribed, so as to be in communication with i the front end of the firetubes, substantially as described.

7'. The boiler composed of the horizontal elongated shell of the samesize throughout, the horizontal fire tubes extending throughout aportion of the length of said shell, said fire tubes arranged in lowerand upper series communicating at their rear ends by a smoke chamber inthe shell, the furnace builtin the lower portion of the front of saidshell so as to communicate with the front of the lower series of thefire tubes, the arch of said furnace of refractory material forming asmoke chamber in the upper portion of the front end of the shell intowhich the upper series of the fire tubes discharge, and doors throughthe front end of the shell, substantially as described.

8. The boiler of the marine or locomotive type having the forwardextension, said boiler being of the same diameter throughout, thefurnace in said extensions built up entirely of refractory material andhaving the arch THOMAS REED BUTMAN.

Witnesses:

'M. L. ALLEN, T. E. WIoKLIN.

